238505803681 has 4 divisors (see below), whose sum is σ = 240821394112. Its totient is φ = 236190213252.

The previous prime is 238505803661. The next prime is 238505803717. The reversal of 238505803681 is 186308505832.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 238505803681 - 2¹⁵ = 238505770913 is a prime.

It is a super-2 number, since 2×238505803681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238505803661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157795061 + ... + 1157795266.

It is an arithmetic number, because the mean of its divisors is an integer number (60205348528).

Almost surely, 2^238505803681 is an apocalyptic number.

It is an amenable number.

238505803681 is a deficient number, since it is larger than the sum of its proper divisors (2315590431).

238505803681 is a wasteful number, since it uses less digits than its factorization.

238505803681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315590430.

The product of its (nonzero) digits is 1382400, while the sum is 49.

The spelling of 238505803681 in words is "two hundred thirty-eight billion, five hundred five million, eight hundred three thousand, six hundred eighty-one".